Most of the Galapagos Islands are located south of the equatorial line; however, Genovesa is north of the equatorial line. The water temperature is warmer at this latitude compared with the rest of the archipelago. The flora and fauna have very special adaptations. Genovesa has the smallest marine iguanas of the six populations found in Galapagos. It also has one of the smallest prickly pear cactus trees due to the lack of terrestrial reptiles.